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True myocardial motion tracking

S E Fischer1, G C McKinnon, M B Scheidegger

  • 1Institute of Biomedical Engineering and Medical Informatics, University of Zurich, Switzerland.

Magnetic Resonance in Medicine
|April 1, 1994
PubMed
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A novel myocardial tagging technique accurately tracks cardiac motion, even through the heart wall. This method improves imaging of the myocardium by accounting for through-plane motion, reducing exam time and artifacts.

Area of Science:

  • Cardiovascular Imaging
  • Medical Physics
  • Biomedical Engineering

Background:

  • Myocardial tagging is crucial for assessing cardiac motion.
  • Existing techniques struggle with fixed imaging planes, leading to inconsistent myocardial slice representation across heart phases.
  • Through-plane motion is a significant challenge in cardiac imaging.

Purpose of the Study:

  • To introduce a new myocardial tagging technique that accounts for through-plane cardiac motion.
  • To improve the accuracy and efficiency of cardiac motion assessment.
  • To overcome limitations of fixed-slice imaging in myocardial tagging.

Main Methods:

  • Developed a novel myocardial tagging technique incorporating through-plane motion compensation.
  • Utilized subtraction imaging to isolate and image the tagged myocardial slice.

Related Experiment Videos

  • Employed two one-dimensionally tagged images to reduce examination time.
  • Applied variable RF excitation flip angles to enhance signal-to-noise ratio.
  • Implemented a repetitive breath-hold scheme to minimize motion artifacts.

    • Main Results:

    • The new technique accurately tracks myocardial tags throughout the cardiac cycle.
    • Achieved high temporal resolution of 35 ms for motion tracking.
    • Demonstrated effective imaging even at the base of the heart and the right ventricle.
    • Successfully reduced motion artifacts and improved signal-to-noise ratio.

    Conclusions:

    • The presented myocardial tagging method offers accurate assessment of cardiac motion, including through-plane movement.
    • This technique enhances imaging consistency and reduces examination time.
    • It provides a valuable tool for cardiovascular research and clinical diagnosis.